Mechanical movement



A. G. BREWER; MECHANICAL MOVEMENT.

(No Model.)

Patented Nov. 14, 1893 INVENTEIR! WITNESS-E51 K 3 A m.

UNITED STATES PATENT OFFICE.

ALBERT G. BREWER, OF HOPKINTON, MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 508,676, dated November 14, 1893.

Application filed April 7,1893- Serial No. 469,403 (No model.)

T0 aZZ whom itmaty concern.-

Be it known that I, ALBERT G. BREWER, of Hopkinton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification. 1

This invention relates to an improved mechanical movement for vibrating a pivotal machine element such as a lever.

The object of the invention is to provide an improved mechanical movement by which a lever or other pivotal. element may be vibratedon. its pivot without being allowed any play at the pivot, and also to provide means of adjustment whereby the stroke of the lever may be regulated so as to begin at different points. I

I The invention is here illustrated as applied to a shearing-machine, in which the movable shearing-blade is carried on one end of 'a lever arranged to be vibrated by my improved mechanical movement.

- Figure 1 shows a side elevation of the machine. Fig. 2 shows an end elevation, as viewed from the left in Fig. 1. Fig. 3 shows a section on the line 33 of Fig. 1. Fig. 4 shows a section on the line 4:4: of Fig. 3. Fig. 5 illustrates the various positions to which the adjusting arm may be brought to regulate the stroke of the lever.

The same letters of reference indicate the same parts in all the figures.

In the'drawings: theletter a designates the supporting-bed of the machine, at one part of which is secured afstationary shearingblade 0.. A lever b is pivoted in bearings b on the bed a, and at one end carries a shearingblade 1) adapted to co-operate with the stationary blade a, to effect a'shearcut. The opposite end of the lever b is bifurcated, and supports a spindle a between its two arms I), said spindle being formed with eccentrics c at each end, and fitting in bearings at the ends of the two-armed lever b. A gear '01 is mounted eccentrically upon the spindle c, and is free to turn thereon. Said gear is formed with a plain peripheral surface d adjacent to its teeth, for a purpose which will hereinafter appear. A handle 6 is fixed on one of the eccentrics c" on the outer side of one of the arms 6 of the lever b, and said arm 6 is provided with a series of depressions If, over which said handle e extends. A latch e is carried by the handle 6, and is pivoted thereto, as shown at e Said latch carries a bolt e pivotally connected with it and extending through an opening 6 in the handle (9, and arranged to be projected into any one of the depressions b in the arm b Aspring e is placed behind the latch e, and serves to hold the bolt e in engagement with the arm 19 It will be observed that the position of the eccentric c with respect to the lever b regulates the distance between the shearing-blades b and a when the blade b is at the upper end of its stroke. When the parts are adjusted as illustrated in Fig. 1, the end of the lever carrying the blade 6 is at the highest position to which it can be brought. By pressing the latch e toward the handle 6, the bolt e may be withdrawn from the depression in the arm 19 with which it is in engagement; and, upon turning the handle 6 to the right, the eccentric 0' will be turned, and the lever 6 moved to bring its forward end nearer to the stationary shearing-blade a. The handle 6 may be locked at the adjustment desired, by releasing the latch e" and allowing the bolt 6 to project into one of the depressions b in the arm I).

A driving pinion f is mounted on ashaftf supported in stationary bearings in the bed a, and said pinion is formed with a plain peripheral surface f 2 adjoining its teeth and engaging the corresponding plain peripheral surface d of the gear'd. The weight of the gear at and attached parts is received on the plain surface f of the driving-pinion, and thus the intermeshing teeth of the gears d and f are relieved of this downward strain.

A collar 9 is mounted loosely on one of the bearings of the shaft f concentrically with' said shaft, and said collar has a projectingarm g, which carries a trundle-roller 9 engaging an annular shoulder g formed in one side of the gear (I. By this means, the gears d and f are held together, and at the same time the gear 01 is allowed to roll or rock on 'the gear f while transmitting motion to the lever 19.

The operation is as follows:, Rotary motion is imparted to the driving-pinion f from any suitable source, and the gear at is revolved thereby. This gear cl being eccentrically mounted upon the spindle c, said spindle will be caused to reciprocate, and impart an oscillatory motion to the lever 12, the gear d rolling, rocking or turning bodily on the gearf, first in one direction and then in the other. Thus the lever b will vibrate on its pivot, without play on said pivot. In the machine here illustrated, the vibrations of the lever carry the shearing-blade b past the stationary blade a. The point at which the downward movement of the blade 1) begins may be varied by adj usting the arm e, in the manner hereinbefore described, and by this means wear of the blade I)? may be compensated for. By means of this adjustmentthe distance between the front end of the lever b and the stationary blade is varied, and thereby wear of the blade I) can be taken up. When the handle e is turned to vary the point of commencement of the stroke, the length of the stroke is slightly affected by the variance of distance between the spindle and the pivot of the lever Z), but this is of no special importance, the main object sought being to vary the point of commence ment of the stroke.

WVhile the invention is here shown applied to a shearingmachine, it is evident that it is capable of embodiment in various other structures, and therefore I wish it understood that my invention is not limited to its application as here shown.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. A mechanical movement, comprising in its construction a lever pivoted to a stationary support, a gear mounted eccentrically on a bearing supported by said lever and having an annular shoulder in one side, a drivinggear in mesh with the first-named gear, and a loose collar concentric with the driving-gear and having a projection engaging the annular shoulder of the first-mentioned gear.

2. A mechanical movement, comprising in its construction a lever pivoted to a stationary support, a gear mounted eccentrically on a bearing supported by said lever, means for adjusting said bearing to vary the position of the lever with respect thereto, and a driving-gear in mesh with the first-named gear.

3. A mechanical movement, comprising in its construction a lever pivoted to a stationary support, aspindle having an eccentric fitting in the lever, a gear mounted eccentrically on the spindle, means for adjusting the spindle to vary the position of the lever with respect thereto, and a driving-gear in mesh with the first-named gear.

4:. A mechanical movement, comprising in its construction a lever pivoted to a stationary support, a spindle having an eccentric fitting in the lover, a gear mounted eccentrically on the spindle, an arm fast with the spindle, a latch on said arm and arranged to secure the spindle and lever together at diiferent adj ustments, and a driving-gear in mesh with the first-mentioned gear.

5. A mechanical movement, comprising in its construction a lever pivoted to a stationary support and having a hearing at its free end and a series of depressions adjacent to the bearing, a spindle having an eccentric fitting said bearing, a gear mounted eccentrically on said spindle, an arm" fixed on the eccentric and having an opening arranged to register with any one of the depressions in the lever, a pivoted latch on the lever havinga pin engaging the opening in the arm and adapted to be projected into any one of the depressions in the lever, and a driving-gearin mesh with the first-mentioned gear.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 3d day of April, A. D. 1893.

ALBERT G. BREWER.

Witnesses:

EMMA L. BREWER, JOHN L. COOK. 

